Dependent Final Exit

Good Day!

I want to aplly final exit Visa for my family and my Iqama expires February 18, 2018.
Q1. What is the last date i can apply for visa.
Q2. They should leave before my iqama expire or they can stay as per final exit visa validity.

please go to MOI absher portal, open the wizard of final exit for dependant.. they have mentioned terms and conditions there. I believe you will get exact information from there..